The World

Why do we smile? Not only do scientists believe they may have discovered the answer to that question, but also to how we perceive the smile. Carl Zimmer, science writer for The New York Times, has the details of this new study to be published in Behavioral and Brain Sciences.

Less than .05% of listeners will donate. Can we count on you?

Our coverage reaches millions each week, but only a small fraction of listeners contribute to sustain our program. We still need 224 more people to donate $100 or $10/monthly to unlock our $67,000 match. Will you help us get there today?